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Today, it’s generally accepted that System z environments span multiple, geographically dispersed data centers. these data centers are increasingly interconnected for the purposes of disaster recovery (dr) and continuous availability (Ca). there are many reasons for this, including the ever-increasing dependency of businesses, governments and society on It services. there’s also the requirement to meet government regulations related to the availability of these It services. Finally, advances in connectivity technology mean it’s now possible to do what previously was impossible, not feasible or even unthinkable…

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The article “Using OpenSSL to Strengthen the Security of Your z/VSE Environment and Communications” provided an overview of OpenSSL, how it was ported to z/VSE and how it’s exploited by the IPv6/VSe product from Barnard Software Inc. Here we discuss a special security flaw in the SHA-1 hash algorithm and show how Transport Layer Security (TLS) Version 1.2 overcomes this problem. It also examines how TLSv1.2 can be used in a z/VSE environment using OpenSSL…

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